243 



In this case there is only ]ust an indication of a fall in the cuive, 

 but there is a much stronger sécrétion of enzyme than has been 

 observed in any of the other cases. 



Fig. 8 shows the course, taken by the sécrétion of diastase in 

 the last three séries plotted according to the second method, as 



Fig. 8. Glucose 1% 



glucose 



2.5% 



4% (omzet- 



tingstijden = times taken for hydrolysis; d == days); (for the last days the lines 

 hâve only been drawn partly, in order to avoid indistinctnesses in the figure). 



described on page 240. It is unnecessary to comment on the curve 

 as the course of events is évident enough from it, 



Turning to the tables on the séries containing starch, the reader 

 will find the day on which the lodine reaction is négative for the 

 first time, marked by a cross. If we turn to the cultures on mix- 

 tures of glucose and starch, we find that my results do not agrée 

 with those of Kylin. It is also very obvious, that the experiment 

 begins to be really important after ail the starch has disappeared 

 from the solution. 



As long as there was starch présent in the solution, the enzyme 

 concentration was determined as follows. Two equal volumes of 



